Charles Spurgeon Commentary Acts 18:24-25

"Now a certain Jew named Apollos, an Alexandrian by race, an eloquent man, came to Ephesus; and he was mighty in the scriptures. This man had been instructed in the way of the Lord; and being fervent in spirit, he spake and taught accurately the things concerning Jesus, knowing only the baptism of John:" — Acts 18:24-25 (ASV)

He had not gotten further than that; but it is always good to share what you do know.

It is the way to learn more. We do not doubt that many a half-instructed Christian is doing good in his own way, and it is not for us to stop him or find fault with him, but rather to quietly seek to tell him more of the truth.

Paul did not say, "Now, Apollos, you must stop this, you know. You had better study. You do not know enough yet," but he let him share what he knew.